code: def test_barh_plot(self):
      def check_barh_plot(pdf, psdf):
          self.assertEqual(
              pdf.plot(kind="barh"), psdf.plot(kind="barh")
          )
          self.assertEqual(pdf.plot.barh(), psdf.plot.barh())
  
      # this is testing when x or y is not assigned
      pdf1 = pd.DataFrame(
          {"lab": [20.1, 40.5, 60.6], "val": [10, 30, 20]}
      )
      psdf1 = ps.from_pandas(pdf1)
      check_barh_plot(pdf1, psdf1)
  
imports: import unittest
  import pprint
  import pandas
  import numpy
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.testing.pandasutils import have_plotly, plotly_requirement_message, PandasOnSparkTestCase, TestUtils
  from pyspark.pandas.utils import name_like_string
label_desc: Use image node_id 9 for calling the DataFramePlotPlotlyTestsMixin obj's underlying member method code with example usage: obj.test_barh_plot() without return types